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forgejo/modules/svg/svg.go
silverwind a51b115b0a
Use inline SVG for built-in OAuth providers (#25171)
The plan is that all built-in auth providers use inline SVG for more
flexibility in styling and to get the GitHub icon to follow
`currentcolor`. This only removes the `public/img/auth` directory and
adds the missing svgs to our svg build.

It should map the built-in providers to these SVGs and render them. If
the user has set a Icon URL, it should render that as an `img` tag
instead.

```
gitea-azure-ad
gitea-bitbucket
gitea-discord
gitea-dropbox
gitea-facebook
gitea-gitea
gitea-gitlab
gitea-google
gitea-mastodon
gitea-microsoftonline
gitea-nextcloud
gitea-twitter
gitea-yandex
octicon-mark-github
```

GitHub logo is now white again on dark theme:

<img width="431" alt="Screenshot 2023-06-12 at 21 45 34"
src="https://github.com/go-gitea/gitea/assets/115237/27a43504-d60a-4132-a502-336b25883e4d">

---------

Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
2023-06-13 10:51:02 +00:00

66 lines
1.6 KiB
Go

// Copyright 2020 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package svg
import (
"fmt"
"html/template"
"path"
"regexp"
"strings"
"code.gitea.io/gitea/modules/html"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/public"
)
var (
// SVGs contains discovered SVGs
SVGs = map[string]string{}
widthRe = regexp.MustCompile(`width="[0-9]+?"`)
heightRe = regexp.MustCompile(`height="[0-9]+?"`)
)
const defaultSize = 16
// Init discovers SVGs and populates the `SVGs` variable
func Init() error {
files, err := public.AssetFS().ListFiles("img/svg")
if err != nil {
return err
}
// Remove `xmlns` because inline SVG does not need it
reXmlns := regexp.MustCompile(`(<svg\b[^>]*?)\s+xmlns="[^"]*"`)
for _, file := range files {
if path.Ext(file) != ".svg" {
continue
}
bs, err := public.AssetFS().ReadFile("img/svg", file)
if err != nil {
log.Error("Failed to read SVG file %s: %v", file, err)
} else {
SVGs[file[:len(file)-4]] = reXmlns.ReplaceAllString(string(bs), "$1")
}
}
return nil
}
// RenderHTML renders icons - arguments icon name (string), size (int), class (string)
func RenderHTML(icon string, others ...interface{}) template.HTML {
size, class := html.ParseSizeAndClass(defaultSize, "", others...)
if svgStr, ok := SVGs[icon]; ok {
if size != defaultSize {
svgStr = widthRe.ReplaceAllString(svgStr, fmt.Sprintf(`width="%d"`, size))
svgStr = heightRe.ReplaceAllString(svgStr, fmt.Sprintf(`height="%d"`, size))
}
if class != "" {
svgStr = strings.Replace(svgStr, `class="`, fmt.Sprintf(`class="%s `, class), 1)
}
return template.HTML(svgStr)
}
return ""
}